Theoretical Driving Course Vehicle Parts and Functions 1 Flashcards

What is the primary function of the vehicle's alternator?

Answer: To generate electrical current and recharge the battery while the engine runs

The alternator is a generator driven by the engine that converts mechanical energy into electrical energy, keeping the battery charged and powering electrical systems while the vehicle is running.

What is the role of the vehicle's radiator?

Answer: To dissipate heat from the engine coolant and prevent overheating

The radiator is part of the cooling system; hot coolant from the engine flows through its fins where air passing over them removes heat, keeping the engine at a safe operating temperature.

What does the vehicle's timing belt or timing chain do?

Answer: It synchronises the rotation of the crankshaft and camshaft so valves open and close at the correct moment

The timing belt/chain keeps the crankshaft and camshaft in precise synchronisation, ensuring the engine's intake and exhaust valves open and close at exactly the right point in the combustion cycle.

What is the function of the vehicle's catalytic converter?

Answer: To convert harmful exhaust pollutants into less harmful gases before they exit the tailpipe

The catalytic converter uses chemical reactions over precious-metal catalysts to convert toxic gases such as carbon monoxide, hydrocarbons, and nitrogen oxides into carbon dioxide, water, and nitrogen.

What is the purpose of the vehicle's master cylinder in the braking system?

Answer: To convert the mechanical force from the brake pedal into hydraulic pressure that activates the brakes

When the driver presses the brake pedal, the master cylinder converts that mechanical force into hydraulic pressure, which is then transmitted through brake lines to the wheel cylinders or callipers to slow the vehicle.

What is the function of the vehicle's fuel injector?

Answer: To spray a precise, atomised amount of fuel directly into the engine's intake manifold or combustion chamber

Fuel injectors are electronically controlled nozzles that deliver exactly the right quantity of atomised fuel at the right moment, enabling efficient combustion and reducing emissions compared to older carburettor systems.